Hello, I'm trying to use the GSM codec with Nufone H323 but it's not working. Does somebody has some idea? Have I missed something? Thanks!! Celso Fassoni Some additional info: (I'm using CVS-HEAD - downloaded today) monkey:~# cat /etc/asterisk/h323.conf [general] port = 1720 bindaddr = 192.168.0.100 ; this SHALL contain a single, valid IP address for this machine disallow=all allow=gsm ; Always allow GSM, it's cool :) context=default *CLI> show modules like chan_h323.so Module Description Use Count chan_h323.so The NuFone Network's Open H.323 Channel 0 1 modules loaded *CLI> show translation Translation times between formats (in milliseconds) Source Format (Rows) Destination Format(Columns) g723 gsm ulaw alaw g726 adpcm slin lpc10 g729 speex ilbc g723 - - - - - - - - - - - gsm - - 5 5 6 5 4 - - - - ulaw - 4 - 1 3 2 1 - - - - alaw - 4 1 - 3 2 1 - - - - g726 - 5 3 3 - 3 2 - - - - adpcm - 4 2 2 3 - 1 - - - - slin - 3 1 1 2 1 - - - - - lpc10 - - - - - - - - - - - g729 - - - - - - - - - - - speex - - - - - - - - - - - ilbc - - - - - - - - - - - *CLI> h.323 show codecs Allowed Codecs: Table: Set: *CLI> h.323 debug H323 debug enabled *CLI> == New H.323 Connection created. -- Setting up Call -- Call token: [ip$192.168.0.1:1088/4096] -- Calling party name: [Celso] -- Calling party number: [] -- Called party name: [89] -- Called party number: [89] --Received SETUP message Allowed Codecs: Table: UserInput/hookflash <1> UserInput/RFC2833 <2> Set: 0: 0: UserInput/hookflash <1> 1: UserInput/RFC2833 <2> =-= In OnAnswerCall for call 4096 - Progress Indicator: 0 - Inserting PI of 0 into ALERTING message Answering call ip$192.168.0.1:1088/4096 -- Transmitting RFC2833 on payload 101 -- Received Facility message... -- Received Facility message... =-= In OnConnectionEstablished for call 4096 -- Connection Established with "Celso [192.168.0.1]" -- ClearCall: Request to clear call with token ip$192.168.0.1:1088/4096, cause EndedByRemoteUser -- Sending RELEASE COMPLETE -- ClearCall: Request to clear call with token ip$192.168.0.1:1088/4096, cause EndedByTransportFail -- ClearCall: Request to clear call with token ip$192.168.0.1:1088/4096, cause EndedByTransportFail -- Celso [192.168.0.1] has cleared the call == H.323 Connection deleted.